Search
Menu Close

Calex ExTemp - Intrinsically safe infrared temperature sensor

Manufacturer:
ExTemp intrinsically safe non-contact infrared temperature sensors measure the temperature of an area of the surface of a solid or liquid, and transmit this as a two-wire, linear 4-20 mA output. Its ATEX and IECEx rating makes it suitable for many applications in hazardous areas.
Part Number: ExTemp
Back to Previous Page
Call for pricing

Measure a wide variety of materials from -20°C to 1000°C in one device

ExTemp intrinsically safe non-contact infrared temperature sensors measure the temperature of an area of the surface of a solid or liquid, and transmit this as a two-wire, linear 4-20 mA output.

Temperature ranges from -20°C to 1000°C are available. All models have an adjustable emissivity setting, and may be used to measure a wide variety of target materials, including food, paper, textiles, plastics, leather, tobacco, pharmaceuticals, chemicals, rubber, coal, asphalt and paint.

A choice of precision optics is available to measure small or large targets at short or long distances.

The optional LCT Loop Configuration Tools (USB and RS-485 adapters) and free software allow the ExTemp to be connected to a PC, PLC or SCADA system for temperature indication, sensor configuration and data acquisition.

These sensors are designed primarily for use in hazardous areas in conjunction with a suitable safety barrier or isolator. All models have been certified Intrinsically Safe for use in gas and dust hazardous areas by Certification Management Ltd. They comply with the European ATEX Directive 2014/34/EU and are covered by certificates for IECEx (international) and UKCA (United Kingdom). The ExTemp Series is also approved for use in Japan (JNIOSHTR-46-1:2020 (General requirements); JNIOSH-TR-46-6:2015 (Intrinsic Safety “i”)).


Features

  • Suitable for hazardous areas, Zone 0, 1 and 2 (gas), and Zone 20, 21 and 22 (dust), with a suitable Intrinsically Safe isolator
  • Temperature range: -20°C to 1000°C
  • Two wire, 4-20 mA output
  • Rescalable output and adjustable emissivity setting via optional USB and RS-485 adapters
  • Fast response time and high stability
  • Stainless steel 316 housing - ideal for offshore applications
  • IP65 sealed
  • Supplied with up to 25 m cable

Target size and distance are critical to accuracy for most IR thermometers

   

Please note: The given measured spot size contains 90% of the energy detected by the sensor. We normally recommend the target is at least twice as large as the given measured spot for maximum accuracy. Sensors may be used at longer distances than the above diagrams show. There is no maximum measurement distance in clean air; this is because the PyroEpsilon detects only the wavelengths of infrared radiation that are not absorbed by the atmosphere. 2:1 optics are not available on sensors with temperature range 0°C to 500°C as standard. Please contact Calex for more information.

Typical Applications

The ExTemp’s IIC T4, IIIC T135°C, ATEX and IECEx rating makes it suitable for many applications in hazardous areas, including:


Petrochemical - condition monitoring

Bearing, gearbox and motor housing surface temperatures in refineries and chemical plants can be monitored without contact, eliminating the need to replace contact probes that are easily damaged by vibration.


Petrochemical - liquid storage and processing

The sensor can be positioned in a Zone 0 environment such as the top of a tank of hazardous liquid or reactor, to measure the surface temperature of the liquid.


Paper

Dust in pulp, paper and packaging plants can create a fire and explosion hazard. The ExTemp intrinsically safe pyrometer can be used for paper web temperature measurement and condition monitoring in ATEX and IECEx classified hazardous areas.


Coal conveyors

The ExTemp's fast 240 ms response time makes it ideal for measuring the surface temperature of coal on conveyors, as well as other bulk materials where there is an explosive dust hazard.


Gas cylinder filling

The surface temperature of cylinders of explosive gases is monitored with the ExTemp as they are filled. The Group IIC, T4 classification makes it suitable for almost all gases including propane, butane, hydrogen and acetylene. The temperature of each cylinder is measured on the filling rig to help detect fault conditions in filling, to calculate the final filled volume (in conjunction with the pressure), to ensure the volume is repeatable, and to improve the filling rate.


Automotive painting

Solvents in automotive painting can create a gas explosion risk. The intrinsically safe ExTemp may be used to monitor the temperature of containers and vessels, the surface temperature of liquids and powders, and the temperature of painted surfaces.


Offshore

The ExTemp's 316 stainless steel housing and intrinsically safe certification makes it well-suited for use on offshore platforms. As well as measuring the temperature of surfaces on the rig, it can be used to measure the temperature of the sea surface.

Technical Information

Temperature Range See table of Model Numbers
Maximum Temperature Span 1000°C
Minimum Temperature Span 100°C
Output 4 to 20 mA
Field of View See table of Model Numbers
Accuracy ± 1°C or 1%, whichever is greater
Repeatability ± 0.5°C or 0.5%, whichever is greater
Emissivity Setting Range 0.20 to 1.00 (pre-set to 0.95)
Emissivity Setting Method Configurable via optional adapters
Response Time 240 ms (90% response)
Spectral Range 8 to 14 μm
Supply Voltage 12 to 24 V DC ± 5%
Maximum Current Draw 25 mA
Maximum Loop Impedance See Application Guide (available separately)

Mechanical

Construction Stainless Steel 316
Major Dimensions Ø 20 x length 150 mm (see Dimensions)
Mounting M20 x 1.5 mm thread, length 46 mm, supplied with two mounting nuts
Cable Length 5 m, 10 m or 25 m as standard (contact Calex for information on extending the cable)
Weight with 5 m Cable 475 g

Environmental

Environmental Rating IP65 (NEMA 4)
Ambient Temperature Range 0°C to 70°C (Operating range)
Ambient Pressure Range 80 kPa (0.8 bar) to 110 kPa (1.1 bar)
Relative Humidity Max. 95% non-condensing
CE Marked Yes
RoHS Compliant Yes

Hazardous Area Classification

The ExTemp is ATEX, IECEx, TIIS and UKCA Ex (UKEX) certified.
ATEX Classification Ex II 1GD
IECEx Classification (Gas)  Ex ia IIC T4 Ga
IECEx Classification (Dust) Ex ia IIIC T135°C IP65 Da
Ambient Temperature Rating -20°C ≤ Ta ≤ 70°C
Maximum DC Input Voltage Ui = 28 V
Maximum Input Current Ii = 93 mA
Maximum Input Power Pi = 650 mW
Maximum Internal Capacitance Ci = 8 nF
Maximum Internal Inductance Li = 0 mH
ATEX Certificate Number CML 14ATEX2079
IECEx Certificate Number IECEx CML 14.0032
JapanEx Certificate Number CML 23JPN2141
UKCA Certificate Number CML 21UKEX2001

Measure a wide variety of materials from -20°C to 1000°C in one device

ExTemp intrinsically safe non-contact infrared temperature sensors measure the temperature of an area of the surface of a solid or liquid, and transmit this as a two-wire, linear 4-20 mA output.

Temperature ranges from -20°C to 1000°C are available. All models have an adjustable emissivity setting, and may be used to measure a wide variety of target materials, including food, paper, textiles, plastics, leather, tobacco, pharmaceuticals, chemicals, rubber, coal, asphalt and paint.

A choice of precision optics is available to measure small or large targets at short or long distances.

The optional LCT Loop Configuration Tools (USB and RS-485 adapters) and free software allow the ExTemp to be connected to a PC, PLC or SCADA system for temperature indication, sensor configuration and data acquisition.

These sensors are designed primarily for use in hazardous areas in conjunction with a suitable safety barrier or isolator. All models have been certified Intrinsically Safe for use in gas and dust hazardous areas by Certification Management Ltd. They comply with the European ATEX Directive 2014/34/EU and are covered by certificates for IECEx (international) and UKCA (United Kingdom). The ExTemp Series is also approved for use in Japan (JNIOSHTR-46-1:2020 (General requirements); JNIOSH-TR-46-6:2015 (Intrinsic Safety “i”)).


Features

  • Suitable for hazardous areas, Zone 0, 1 and 2 (gas), and Zone 20, 21 and 22 (dust), with a suitable Intrinsically Safe isolator
  • Temperature range: -20°C to 1000°C
  • Two wire, 4-20 mA output
  • Rescalable output and adjustable emissivity setting via optional USB and RS-485 adapters
  • Fast response time and high stability
  • Stainless steel 316 housing - ideal for offshore applications
  • IP65 sealed
  • Supplied with up to 25 m cable